Some time ago I tore tendons in my leg and was in agony for several weeks. Paracetamol didn't work. Neither did Aspirin or Ibroprufin or even Co-codamol. Not even the little black tablets the doctor gave me, whatever they were.
   In the end my wife (who is Chinese, remember) lost her temper and said, 'Why doesn't the doctor just prescribe you muffins?'
   Why not, indeed.